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Triticum. 
Winter^ and spring habit in wlieat. 
Thick-hollow^ thin-solid^ angular, circular, bristly^ and smooth stems. 
Rough^ smooth^ broad and narrow leaves. 
Beardless^ bearded^ compact^ and dense ears. 
Felted^ smooth^ keeled, rounded^ large^ and small glumes. 
Red, white, and grey chaff. 
Red, white, long-narrow, and short-round grains. 
Hard-translucent, soft-opaque endosperms. 
8trong, and weak quaUty of flour. 
High, and low yield of grain. 
Early, and late ripening of grain. 
Susceptibility and immiinity to yellow rnst. 
{Spinmann, Tschermak, Biffen, John Wilson, and Nilsson — Ehle.) 
Tropaeolum. 
Tall, and dwarf habit of growth. 
Red, and yellow flowers. (Weiß.) 
Ulmus. 
Opposite, alternate, small, and large leaves. 
Long, and short petioles in the Elm. (Henry.) 
Urtica. 
Much serrated, and little serrated edges of leaves in the Nettle. 
Green, and yelloAv-green (Chlorina) leaves. (Correns, and Baiir.) 
Verbascum. 
Yellow, and white flowers. (Shull.) 
Veronica. 
Bhie, and white flowers. (de Yries.) 
Viola. 
Dissected, undissected, pubescent, and glabrous leaves in tlie 
Violet. 
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